package com.blog.commons.aop;


import cn.hutool.json.JSONUtil;
import com.blog.commons.annotation.Log;
import com.blog.commons.utils.IpUtil;
import com.blog.pojo.TbBlogLog;
import com.blog.service.LogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @program: dal-blog
 * @description: 切面类操作日志记录
 * @author: jian
 * @create: 2022-04-02 13:56
 **/

@Aspect
@Component
public class LogAspect {
    /**
     * 操作版本号
     * <p>
     * 项目启动时从命令行传入，例如：java -jar xxx.war --version=201902
     * </p>
     */
    @Value("${version}")
    private String operVer;

    @Autowired
    private LogService operationLogService;

    @Autowired
    private LogService exceptionLogService;

    /**
     * 设置操作日志切入点 记录操作日志 在注解的位置切入代码
     */
    @Pointcut("@annotation(com.blog.commons.annotation.Log)")
    public void operLogPoinCut() {
    }

    /**
     * 设置操作异常切入点记录异常日志 扫描所有controller包下操作
     */
    @Pointcut("execution(* com.blog.controller..*.*(..))")
    public void operExceptionLogPoinCut() {
    }

    /**
     * 正常返回通知，拦截用户操作日志，连接点正常执行完成后执行， 如果连接点抛出异常，则不会执行
     *
     * @param joinPoint 切入点
     * @param keys      返回结果
     */
    @AfterReturning(value = "operLogPoinCut()", returning = "keys")
    public void saveOperLog(JoinPoint joinPoint, Object keys) {
        // 获取RequestAttributes
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        // 从获取RequestAttributes中获取HttpServletRequest的信息
        HttpServletRequest request = (HttpServletRequest) requestAttributes
                .resolveReference(RequestAttributes.REFERENCE_REQUEST);

        TbBlogLog blogLog = new TbBlogLog();
        Map<String, Object> map = new HashMap<>();
        try {
            // 从切面织入点处通过反射机制获取织入点处的方法
            MethodSignature signature = (MethodSignature) joinPoint.getSignature();
            // 获取切入点所在的方法
            Method method = signature.getMethod();
            // 获取操作
            Log log = method.getAnnotation(Log.class);
            if (log != null) {
                String model = log.model();
                String type = log.type();
                String desc = log.desc();
                map.put("操作模块",model);
                map.put("操作类型",type);
                blogLog.setOperation(desc);
            }
            // 获取请求的类名
            String className = joinPoint.getTarget().getClass().getName();
            // 获取请求的方法名
            String methodName = method.getName();
            methodName = className + "." + methodName;
            map.put("请求方法",methodName);
            // 请求的参数
            Map<String, String> rtnMap = converMap(request.getParameterMap());
            // 将参数所在的数组转换成json
            String params = JSONUtil.toJsonStr(rtnMap);;
            map.put("请求参数",params);
            map.put("返回结果",JSONUtil.toJsonStr(keys));
            map.put("请求IP", IpUtil.getIpAddr(request));
            map.put("请求URI",request.getRequestURI());
            map.put("操作版本",operVer);
            blogLog.setOperationUser(request.getSession().getAttribute("loginUser").toString());
            blogLog.setRemark(JSONUtil.toJsonStr(map));
            blogLog.setCreateTime(new Date());
            blogLog.setType("1");
            operationLogService.addLog(blogLog);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 异常返回通知，用于拦截异常日志信息 连接点抛出异常后执行
     *
     * @param joinPoint 切入点
     * @param e         异常信息
     */
    @AfterThrowing(pointcut = "operExceptionLogPoinCut()", throwing = "e")
    public void saveExceptionLog(JoinPoint joinPoint, Throwable e) {
        // 获取RequestAttributes
        RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
        // 从获取RequestAttributes中获取HttpServletRequest的信息
        HttpServletRequest request = (HttpServletRequest) requestAttributes
                .resolveReference(RequestAttributes.REFERENCE_REQUEST);

        TbBlogLog excepLog = new TbBlogLog();
        try {
            // 从切面织入点处通过反射机制获取织入点处的方法
            MethodSignature signature = (MethodSignature) joinPoint.getSignature();
            // 获取切入点所在的方法
            Method method = signature.getMethod();
            // 获取请求的类名
            String className = joinPoint.getTarget().getClass().getName();
            // 获取请求的方法名
            String methodName = method.getName();
            methodName = className + "." + methodName;
            // 请求的参数
            Map<String, String> rtnMap = converMap(request.getParameterMap());
            Map<String, Object> map = new HashMap<>();

            // 将参数所在的数组转换成json
            String params = JSONUtil.toJsonStr(rtnMap);
            map.put("请求参数",params);
            map.put("请求方法名",methodName);
            map.put("异常名称",e.getClass().getName());
            map.put("异常信息",stackTraceToString(e.getClass().getName(), e.getMessage(), e.getStackTrace()));
            map.put("操作URI",request.getRequestURI());
            map.put("操作员IP",IpUtil.getIpAddr(request));
            map.put("操作版本号",operVer);
            excepLog.setOperationUser(request.getSession().getAttribute("loginUser").toString());
            excepLog.setCreateTime(new Date()); // 发生异常时间
            excepLog.setRemark(JSONUtil.toJsonStr(map));
            excepLog.setType("2");
            exceptionLogService.addLog(excepLog);

        } catch (Exception e2) {
            e2.printStackTrace();
        }

    }

    /**
     * 转换request 请求参数
     *
     * @param paramMap request获取的参数数组
     */
    public Map<String, String> converMap(Map<String, String[]> paramMap) {
        Map<String, String> rtnMap = new HashMap<String, String>();
        for (String key : paramMap.keySet()) {
            rtnMap.put(key, paramMap.get(key)[0]);
        }
        return rtnMap;
    }

    /**
     * 转换异常信息为字符串
     *
     * @param exceptionName    异常名称
     * @param exceptionMessage 异常信息
     * @param elements         堆栈信息
     */
    public String stackTraceToString(String exceptionName, String exceptionMessage, StackTraceElement[] elements) {
        StringBuffer strbuff = new StringBuffer();
        for (StackTraceElement stet : elements) {
            strbuff.append(stet + "\n");
        }
        String message = exceptionName + ":" + exceptionMessage + "\n\t" + strbuff.toString();
        return message;
    }
}
